<template>
  <div>
    <!-- 面包屑导航区域 breadcrumb ブレッドクラム separator セパレーター 分隔器-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示框 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="sunItem"
                  v-for="(sunItem, i) in item.attr_vals"
                  :key="i"
                  size="mini"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabledata"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals" readonly></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的后台API地址(要填写完整地址) -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传图片</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="addBtn" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="35%"
    >
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品的详情描述(编辑器)
        goods_introduce: '',
        attrs: []
      },
      // 商品分类列表数据
      cateList: [],
      // 添加商品的表单验证规则
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 商品参数Tab标签的动态参数数据
      manyTableData: [],
      // 商品参数Tab标签的商品属性数据
      onlyTabledata: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头
      headerObj: {
        //添加权限
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的路径
      previewPath: '',
      previewDialogVisible: false,
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
      this.$message.success('获取商品分类数据成功')
    //   console.log(this.cateList)
    },
    //级联选择器变化事件
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //切换Tab标签事件
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex)
      //商品参数(动态参数)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('请求动态参数失败')
        }
        //    console.log(res.data)
        //    通过循环把每项下的字符串变成数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        this.$message.success('请求动态参数成功')
      }
      //商品参数
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('请求商品属性失败')
        }
        // res.data.forEach( item => {
        //     item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        this.onlyTabledata = res.data
        this.$message.success('请求商品属性成功')
        // console.log(res.data)
      }
    },
    // 处理图片预览事件
    handlePreview(file) {
      //  console.log(file)
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    //  处理图片删除事件
    handleRemove(file) {
      //获取被删除图片的路径
      const filePath = file.response.data.tmp_path
      //搜索被删除图片在pics中的索引
      //findIndex x是数组的每一项,返回索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      //从数组中删除图片
      this.addForm.pics.splice(i, 1)
    //   console.log(this.addForm)
    },
    //图片上传成功事件
    handleSuccess(response) {
      // console.log(response)
      // 拼接图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      //添加到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 添加商品按钮
    addGoods() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必须项')
        }
        // 执行添加逻辑
        // 使用lodash插件方法cloneDeep进行深拷贝
        const copyAddForm = _.cloneDeep(this.addForm)
        copyAddForm.goods_cat = copyAddForm.goods_cat.join(',')
        //    处理动态参数
        this.manyTableData.forEach(item => {
          const newManyTableData = {
            attr_id: item.attr_id,
            attr_vals: "item.attr_vals.join(' ')"
          }
          this.addForm.attrs.push(newManyTableData)
        })
        // 处理静态参数
        this.onlyTabledata.forEach(item => {
          const newOnlyTabledata = {
            attr_id: item.attr_id,
            attr_vals: item.attr_vals
          }
          this.addForm.attrs.push(newOnlyTabledata)
        })
        // 把请求数据赋给深拷贝的数据用于请求
        copyAddForm.attrs = this.addForm.attrs
        // 发起请求添加商品
        const { data: res } = await this.$http.post('goods', copyAddForm)
        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        //跳转页面到
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.addBtn {
  margin-top: 15px;
}
</style>
